RFC 7986 - additional parameters and values

[niccokunzmann]

RFC 7986 specifies a few new parameters that we should make sure we support:

• 5.1. NAME Property
• 5.2. DESCRIPTION Property
• 5.3. UID Property
• 5.4. LAST-MODIFIED Property
• 5.5. URL Property
• 5.6. CATEGORIES Property
• 5.7. REFRESH-INTERVAL Property
• 5.8. SOURCE Property
• 5.9. COLOR Property
• 5.10. IMAGE Property
• 5.11. CONFERENCE Property
• 6.1. DISPLAY Property Parameter
• 6.2. EMAIL Property Parameter
• 6.3. FEATURE Property Parameter
• 6.4. LABEL Property Parameter

These properties should have the right type in the right object, be serializable

• there is one example file with all properties
• ICS -> obj -> ICS

See also:

• https://www.rfc-editor.org/rfc/rfc7986.html
• Claiming compatibility to other RFCs/updates of RFC5545 #589